From the moment Donald Trump was elected president, questions started arising about his ability to separate his private business deals from his official duties. Critics became especially alarmed about his overseas holdings, fearing they could influence his foreign policy decisions.

In the year since taking office, has he found ways to address the ethical questions that could taint his foreign policy credibility?

On the evening of Saturday, Nov. 4, the authorities in Saudi Arabia began rounding up dozens of businessmen, ministers and princes. It was a striking start to an anti-corruption campaign spearheaded by the young and powerful Crown Prince Mohammed bin Salman.

One of the world's most famous — and flashy — billionaires is being detained by the Saudi government in the Saudi capital, Riyadh. Prince Alwaleed bin Talal was swept up in early November, along with more than 200 other Saudi businessmen and princes, in a massive anti-corruption campaign spearheaded by Saudi Crown Prince Mohammed bin Salman. Many analysts saw it as a power grab by the young prince.